Liao Chang 3ca8a07f14 RISC-V: use memcpy for kexec_file mode ... [ Upstream commit b7fb4d78a6 ] The pointer to buffer loading kernel binaries is in kernel space for kexec_fil mode, When copy_from_user copies data from pointer to a block of memory, it checkes that the pointer is in the user space range, on RISCV-V that is: static inline bool __access_ok(unsigned long addr, unsigned long size) { return size <= TASK_SIZE && addr <= TASK_SIZE - size; } and TASK_SIZE is 0x4000000000 for 64-bits, which now causes copy_from_user to reject the access of the field 'buf' of struct kexec_segment that is in range [CONFIG_PAGE_OFFSET - VMALLOC_SIZE, CONFIG_PAGE_OFFSET), is invalid user space pointer. This patch fixes this issue by skipping access_ok(), use mempcy() instead. Signed-off-by: Liao Chang <liaochang1@huawei.com> Link: https://lore.kernel.org/r/20220408100914.150110-3-lizhengyu3@huawei.com Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com> Signed-off-by: Sasha Levin <sashal@kernel.org>		2022-06-14 18:41:28 +02:00
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boot	riscv: dts: sifive: fu540-c000: align dma node name with dtschema	2022-05-25 09:59:11 +02:00
configs	riscv: fix nommu_k210_sdcard_defconfig	2022-02-24 19:22:55 -08:00
errata	riscv: errata: alternative: mark vendor_patch_func __initdata	2022-01-09 11:02:46 -08:00
include	riscv: Move alternative length validation into subsection	2022-06-09 10:25:13 +02:00
kernel	RISC-V: use memcpy for kexec_file mode	2022-06-14 18:41:28 +02:00
kvm	RISC-V: KVM: Restrict the extensions that can be disabled	2022-04-27 14:41:03 +02:00
lib	riscv: Fixed misaligned memory access. Fixed pointer comparison.	2022-04-13 19:27:21 +02:00
mm	RISC-V: Fix the XIP build	2022-06-09 10:26:14 +02:00
net	riscv: bpf: Fix eBPF's exception tables	2022-01-19 10:50:02 -08:00
Kbuild	kbuild: use more subdir- for visiting subdirectories while cleaning	2021-10-24 13:49:46 +09:00
Kconfig	RISC-V Patches for the 5.17 Merge Window, Part 2	2022-01-22 09:34:49 +02:00
Kconfig.debug	…
Kconfig.erratas	riscv: alternative only works on !XIP_KERNEL	2022-03-10 10:05:19 -08:00
Kconfig.socs	riscv: alternative only works on !XIP_KERNEL	2022-03-10 10:05:19 -08:00
Makefile	riscv: Fixup difference with defconfig	2022-06-09 10:26:11 +02:00